Basic Info.

Model NO.


Pullution Sources

Air Pollution Control

Processing Methods






HS Code


Product Description

Regenerative Thermal Oxidizer (RTO);
The most widely used oxidation technique nowadays for
VOC emission reduction,; suitable for treating a wide range of solvents and processes.; Depending on air volume and required purification efficiency,; a RTO comes with 2,; 3,; 5 or 10 chambers.;

Wide range of VOC’s to be treated
Low maintenance cost
High Thermal Efficiency
Does not generate any waste
Adaptable for small,; medium and large air flows
Heat Recovery via bypass if VOCs concentration exceed the auto-thermal point

Auto-thermal and Heat Recovery:;
Thermal Efficiency > 95%
Auto-thermal point at 1.;2 – 1.;7 mgC/Nm3
Air flow range from 2,; 000 up to 200,; 000m3/h

High VOC’s destruction
The purification efficiency is normally in excess of 99%

Address: No 3 North Xihu (West Lake) Dis. Road, Xihu (West Lake) Dis., HangZhou, ZheJiang , China

Business Type: Manufacturer/Factory

Business Range: Manufacturing & Processing Machinery, Service

Management System Certification: ISO 14001, ISO 9001, OHSAS/ OHSMS 18001, QHSE

Main Products: Dryer, Extruder, Heater, Twin Screw Extruder, Electrochemical Corrosion Protection Equ, Screw, Mixer, Pelletizing Machine, Compressor, Pelletizer

Company Introduction: The Res. Inst of Chem. Mach of the Ministry of Chemical Industry was founded in ZheJiang in 1958, and moved to HangZhou in 1965.

The Res. Inst of Automation of the Ministry of Chemical Industry was founded in HangZhou in 1963.

In 1997, the Res. Inst. Of Chem. Mach of the Ministry of Chemical Industry and the Res. Inst. Of Automation of the Ministry of Chemical Industry were combined to become the Res. Inst of Chemical Machinery and Automation of the Ministry of Chemical Industry.

In 2000, the Res. Inst of Chemical Machinery and Automation of the Ministry of ChemicalIndustry completed its transformation to enterprise and registered as CZPT Instituteof Chemical Machinery and Automation.

Tianhua Institute has the following subordinated institutions:

Supervision and Inspection Center of the Quality of Chemical Equipments in HangZhou, ZheJiang Province

HangZhou Equipment Institute in HangZhou, ZheJiang Province;

Automation Institute in HangZhou, ZheJiang Province;

HangZhou Ruima Chemical Machinery Co Ltd in HangZhou, ZheJiang Province;

HangZhou Ruide Drying Technology Co Ltd in HangZhou, ZheJiang Province;

HangZhouLantai Plastics Machinery Co Ltd in HangZhou, ZheJiang Province;

ZheJiang Airuike Automation Technology Co Ltd in HangZhou, ZheJiang Province;

The HangZhou United Institute of Chemical Machinery and automation and the HangZhou United Institute of Petrochemical Industry Furnaces were founded by CZPT Institute and the Sinopec.

Tianhua Institute has an occupation area of 80 000m2 and a total asset of 1 Yuan (RMB). The annual output value is 1 Yuan (RMB).

Tianhua Institute has about 916 employees, 75% of them are professional personnel. Among them are 23 professors, 249senior engineers, 226 engineers. 29 professors and senior engineers enjoy national special subsidy, On 5 people the title of Middle-aged and Young Specialist with Outstanding Contribution to the P. R. China are conferred

regenerative thermal oxidizers

Can regenerative thermal oxidizers be used for treating industrial wastewater?

No, regenerative thermal oxidizers (RTOs) are not typically used for treating industrial wastewater. RTOs are specifically designed for air pollution control and the treatment of gaseous pollutants, such as volatile organic compounds (VOCs) and hazardous air pollutants (HAPs).

Here are some key points to consider regarding the use of RTOs for treating industrial wastewater:

  • Operating Principle: RTOs rely on the combustion of pollutants in the gas phase. They utilize high temperatures to thermally oxidize gaseous pollutants, converting them into carbon dioxide and water vapor. However, wastewater treatment involves the removal or transformation of contaminants dissolved or suspended in water, which requires different treatment mechanisms.
  • Wastewater Treatment Technologies: Wastewater treatment typically involves processes such as physical separation, chemical treatment, biological treatment, and other specialized techniques depending on the nature of the contaminants. Common wastewater treatment technologies include activated sludge systems, sedimentation tanks, chemical precipitation, filtration, and various other methods tailored to specific wastewater characteristics.
  • Environmental Regulations: Industrial wastewater treatment is subject to stringent environmental regulations and discharge standards that govern the quality of effluent released into water bodies. Compliance with these regulations requires the implementation of appropriate wastewater treatment technologies specifically designed for the removal or reduction of contaminants in water, rather than air pollution control technologies like RTOs.
  • Integration with Wastewater Treatment Systems: While RTOs are not used for wastewater treatment, they may be integrated into overall industrial process systems where wastewater treatment is also required. In such cases, separate wastewater treatment technologies are employed to treat the wastewater, and RTOs are used to address air emissions resulting from the wastewater treatment process or other industrial operations.

In summary, regenerative thermal oxidizers are not suitable for treating industrial wastewater. They are designed for air pollution control and the destruction of gaseous pollutants. For effective wastewater treatment, industries should employ appropriate wastewater treatment technologies specifically designed for the removal or transformation of contaminants in water.

regenerative thermal oxidizers

How do regenerative thermal oxidizers compare to biofilters in terms of performance?

Regenerative thermal oxidizers (RTOs) and biofilters are both widely used technologies for the treatment of air pollutants, but they differ in their operating principles and performance characteristics. Here’s a comparison of RTOs and biofilters in terms of their performance:

Performance Aspect Regenerative Thermal Oxidizers (RTOs) Biofilters
Emission Removal Efficiency RTOs are highly efficient in removing volatile organic compounds (VOCs) and hazardous air pollutants (HAPs). They can achieve destruction efficiencies above 95% for these pollutants. Biofilters also have the potential to achieve high removal efficiencies for certain VOCs and odorous compounds. However, their performance can vary depending on the specific contaminants and the microbial activity in the biofilter.
Applicability RTOs are versatile and can handle a wide range of pollutants, including VOCs, HAPs, and odorous compounds. They are well-suited for high flow rates and high pollutant concentrations. Biofilters are particularly effective in treating odorous compounds and certain VOCs. They are commonly used in applications such as wastewater treatment facilities, composting operations, and agricultural facilities.
Energy Consumption RTOs require a significant amount of energy to reach and maintain high operating temperatures for oxidation. They rely on fuel combustion or external heat sources for the thermal energy needed. Biofilters are considered low energy consumption systems as they rely on the natural biological activity of microorganisms to break down pollutants. They generally do not require external heating or fuel consumption.
Maintenance RTOs typically require regular maintenance and monitoring to ensure proper operation. This includes inspections, cleaning of heat exchange media, and potential repairs or replacements of components. Biofilters require periodic maintenance to optimize their performance. This may involve monitoring and adjusting moisture levels, controlling temperature, and occasionally replacing the filter media or adding microbial inoculants.
Capital and Operating Costs RTOs generally have higher capital costs compared to biofilters due to their complex design, specialized materials, and energy-intensive operation. Operating costs include fuel consumption or electricity for heating. Biofilters generally have lower capital costs compared to RTOs. They are simpler in design and do not require fuel consumption. However, operating costs may include periodic replacement of filter media and potential odor control measures.

It is important to note that the selection of the appropriate technology depends on various factors such as the specific pollutants to be treated, process conditions, regulatory requirements, and site-specific considerations. Consulting with environmental engineers or air pollution control experts can help determine the most suitable technology for a particular application.

In summary, RTOs and biofilters offer different performance characteristics, with RTOs excelling in high removal efficiencies, versatility, and suitability for high-flow and high-concentration applications, while biofilters are effective for odorous compounds, have low energy consumption, and generally lower capital costs.

regenerative thermal oxidizers

Are regenerative thermal oxidizers environmentally friendly?

Regenerative thermal oxidizers (RTOs) are considered environmentally friendly air pollution control devices due to several reasons:

  • High Efficiency in Pollutant Destruction: RTOs are highly efficient in destroying pollutants, including volatile organic compounds (VOCs) and hazardous air pollutants (HAPs). They typically achieve destruction efficiencies exceeding 99%. This means that the vast majority of harmful pollutants are converted into harmless byproducts, such as carbon dioxide and water vapor.
  • Compliance with Emission Regulations: RTOs help industries comply with stringent air quality regulations and emission limits set by environmental agencies. By effectively removing pollutants from industrial exhaust streams, RTOs help reduce the release of harmful substances into the atmosphere, contributing to improved air quality.
  • Minimal Secondary Pollutant Formation: RTOs minimize the formation of secondary pollutants. The high temperatures within the combustion chamber promote the complete oxidation of pollutants, preventing the formation of uncontrolled byproducts, such as dioxins and furans, which can be more harmful than the original pollutants.
  • Energy Efficiency: RTOs incorporate heat recovery systems that improve energy efficiency. They capture and utilize the heat generated during the oxidation process to preheat the incoming process air, reducing the energy requirements for heating. This energy recovery feature helps minimize the overall environmental impact of the system.
  • Reduction of Greenhouse Gas Emissions: By effectively destroying VOCs and HAPs, RTOs contribute to the reduction of greenhouse gas emissions. VOCs are significant contributors to the formation of ground-level ozone and are associated with climate change. By eliminating VOC emissions, RTOs help mitigate the environmental impact associated with these pollutants.
  • Applicability to Various Industries: RTOs are widely applicable across different industries and processes. They can handle a wide range of exhaust volumes, pollutant concentrations, and variations in gas composition, making them versatile and adaptable to various industrial applications.

While RTOs offer significant environmental benefits, it’s important to note that their overall environmental performance depends on proper design, operation, and maintenance. Regular inspections, maintenance, and adherence to manufacturer’s guidelines are crucial to ensuring the continued effectiveness and environmental friendliness of RTOs.

editor by CX 2023-09-01